New names for two well-known shore barnacles (Cirripedia, Thoracica) from Australia and New Zealand

Abstract
Chamaesipho tasmanica sp.nov., from temperate Australian shores, is distinguished from Chamaesipho columna sensu Darwin from New Zealand shores. Tetraclitella depressa sp.nov., from New Zealand shores, is distinguished from Tetraclitella purpurascens (Wood) from temperate Australian shores. The identity of Lepas columna Spengler (1790) is discussed, and it is concluded that two New Zealand species were involved, C. columna sensu Darwin (in part) and Epopella plicata (Gray).

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